Decisive probability using Poisson distribution.

describe the transportation department in a River City is attempting to optimize the number of toll stations it operates on a bridge and in a typical hour 300 cars use the bridge.

1) For a particular 1 minute interval and what is the probability that there are exactly six cars arriving at the bridge?

2) For a particular 1 minute interval and what is the probability that there are 5 or fewer cars arriving at the bridge?

3) For a particular 2 minute interval and what is the probability that there are 6 or more cars arriving at the bridge?